Multiple Choice
Identify the
choice that best completes the statement or answers the question.
|
|
|
1.
|
The accepted value for a quantity is 5.67 g. If the measured value is 5.89 g,
what is the percent error?
a. | 1.04% | c. | 3.74% | b. | 3.74% | d. | 3.88% |
|
|
|
2.
|
Which is NOT a chemical change?
a. | a piece of wood is burned | c. | a bar of iron
rusts | b. | an egg is cooked | d. | ingredients for a cake are stirred together |
|
|
|
3.
|
Which is the separation technique that identifies parts of a mixture based on
how fast different compounds move across a material?
a. | filtration | c. | chromatography | b. | distillation | d. | crystallization |
|
|
|
4.
|
Which is a compound?
a. | sodium | c. | carbon dioxide | b. | sea water | d. | brass |
|
|
|
5.
|
Which of the following formations is a physical property of copper?
a. | A deep blue solution when in contact with ammonia. | b. | A new substance when
combined with nitric acid. | c. | A green copper carbonate compound when in
contact with moist air. | d. | A formation of a drill gauge and
wire. |
|
|
|
6.
|
How many neutrons are in an atom of chlorine?
|
|
|
7.
|
Which is a transition element with five d-block electrons in energy level
4?
a. | Niobium (Nb) | c. | Manganese (Mn) | b. | Renium (Re) | d. | Technetium (Tc) |
|
|
|
8.
|
Which block contains 5 orbitals?
|
|
|
9.
|
According to ____ periodic table, the physical and chemical properties of
elements are periodic functions of their atomic weights.
a. | Dmitri Mendeleev’s | c. | Henry
Moseley’s | b. | John Newlands’ | d. | Lothar Meyer’s |
|
|
|
10.
|
Which is described as the force holding two atoms together?
a. | cation | c. | formula unit | b. | chemical bond | d. | lattice |
|
|
|
11.
|
Which is the charge that results when oxygen becomes an ion?
|
|
|
12.
|
A compound has the formula X3Y. For every 15 X atoms present in this
compound, how many Y atoms are there?
|
|
|
13.
|
Which is a physical property of ionic compounds in their solid state?
a. | good conductor of electricity | b. | weak attractive forces between
ions | c. | low boiling point | d. | high melting
point |
|
|
|
14.
|
Which is a correct statement of bond strength?
a. | Compounds with smaller atoms have weaker bond strength. | b. | Compounds with a
higher total number of atoms in the compound have greater bond strength. | c. | Compounds containing
ions with greater charges have higher bond strength. | d. | Compounds with a more negative lattice energy
have lower bond strength. |
|
|
|
15.
|
Which is the correct formula for the compound formed between beryllium and
nitrogen?
a. | BeN | c. | Be3N2 | b. | Be3N | d. | Be2N3 |
|
|
|
16.
|
Which is NOT a diatomic molecule?
a. | Fluorine | c. | Bromine | b. | Nitrogen | d. | Boron |
|
|
|
17.
|
Covalent compounds display which of these properties?
a. | They are hard, brittle solids | b. | They have high melting and boiling
points | c. | They display luster. | d. | Their intermolecular forces are relatively
weak. |
|
|
|
18.
|
What molecular shape does the compound CCl4 have?
a. | trigonal planar | c. | octahedral | b. | tetrahedral | d. | bent |
|
|
|
19.
|
Which is the correct formula for the compound phosphoric acid?
a. | H3P | c. | H3PO4 | b. | HPO3 | d. | H3PO3 |
|
|
|
20.
|
Which element has a molar mass of 30.974 g/mol?
a. | Potassium | c. | Gallium | b. | Phosphorus | d. | Palladium |
|
|
|
21.
|
The name of a hydrate is calcium chloride dihydrate. What is its formula?
a. | CaCl2•H4O2 | c. | 2CaCl2•H2O | b. | CaCl2•2H2O | d. | CaCl2•H2O |
|
|
|
22.
|
How many grams are in 1.946 moles of NaCl?
a. | 113.7 g | c. | 0.033 g | b. | 30.1 g | d. | 44.7 g |
|
|
|
23.
|
Find the formula for the compound that contains 72.40% iron and 27.60%
oxygen.
a. | FeO | c. | Fe3O4 | b. | Fe2O3 | d. | FeO2 |
|
|
|
24.
|
How many moles of Cu are needed to react with 5.8 moles of
AgNO3?
Cu + 2 AgNO3 ®
Cu(NO3)2 + 2 Ag
a. | 2.9 moles | c. | 5.8 moles | b. | 3.8 moles | d. | 11.6 moles |
|
|
|
25.
|
Which is the correct number of moles of NO that is produced from 13.2 moles of
oxygen gas in the presence of excess ammonia?
4 NH3 (g) + 5 O2 (g) ® 4 NO (g) + 6 H2O (l)
a. | 10.6 moles | c. | 1.52 moles | b. | 12.2 moles | d. | 16.5 moles |
|
|
|
26.
|
How many grams of water are produced when 2.50 mol oxygen reacts with
hydrogen?
H2 + O2 ® H2O
a. | 45.0 g | c. | 90.0 g | b. | 22.5 g | d. | 3.6 g |
|
|
|
27.
|
A chemical reaction can theoretically produce 137.5 grams of product, but in
actuality 112.9 grams are produced. Which is the percent yield for this reaction?
a. | 82.1% | c. | 24.6% | b. | 62.0 g | d. | 17.9% |
|
|
|
28.
|
What volume does .0685 mol of gas occupy at STP?
a. | .3707 mol | c. | 1.53 L | b. | .7515 mol | d. | 3.06 L |
|
|
|
29.
|
The _____ law of thermodynamics states that energy is neither created nor
destroyed.
a. | first | c. | third | b. | second | d. | fourth |
|
|
|
30.
|
The __________ law of thermodynamics states that spontaneous processes always
proceed in such a way that the entropy of the universe increases.
a. | first | c. | third | b. | second | d. | fourth |
|